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Diffstat (limited to 'src/devices/cpu/tms9900/tms9995.cpp')
-rw-r--r--src/devices/cpu/tms9900/tms9995.cpp26
1 files changed, 15 insertions, 11 deletions
diff --git a/src/devices/cpu/tms9900/tms9995.cpp b/src/devices/cpu/tms9900/tms9995.cpp
index c83f74ac073..67a0439a8ba 100644
--- a/src/devices/cpu/tms9900/tms9995.cpp
+++ b/src/devices/cpu/tms9900/tms9995.cpp
@@ -1562,7 +1562,7 @@ void tms9995_device::prefetch_and_decode()
m_value_copy = m_current_value;
if (!m_iaq_line.isnull()) m_iaq_line(ASSERT_LINE);
m_address = PC;
- LOGMASKED(LOG_DETAIL, "**** Prefetching new instruction at %04x ****\n", PC);
+ LOGMASKED(LOG_DETAIL, "** Prefetching new instruction at %04x **\n", PC);
}
word_read(); // changes m_mem_phase
@@ -1575,7 +1575,7 @@ void tms9995_device::prefetch_and_decode()
m_current_value = m_value_copy; // restore m_current_value
PC = (PC + 2) & 0xfffe; // advance PC
if (!m_iaq_line.isnull()) m_iaq_line(CLEAR_LINE);
- LOGMASKED(LOG_DETAIL, "++++ Prefetch done ++++\n");
+ LOGMASKED(LOG_DETAIL, "++ Prefetch done ++\n");
}
}
@@ -1688,7 +1688,7 @@ void tms9995_device::service_interrupt()
vectorpos = 0x0008;
m_intmask = 0x0001;
PC = (PC + 2) & 0xfffe;
- LOGMASKED(LOG_INT, "***** MID pending\n");
+ LOGMASKED(LOG_INT, "** MID pending\n");
m_mid_active = false;
}
else
@@ -1698,7 +1698,7 @@ void tms9995_device::service_interrupt()
vectorpos = 0xfffc;
m_int_pending &= ~PENDING_NMI;
m_intmask = 0;
- LOGMASKED(LOG_INT, "***** NMI pending\n");
+ LOGMASKED(LOG_INT, "** NMI pending\n");
}
else
{
@@ -1706,9 +1706,12 @@ void tms9995_device::service_interrupt()
{
vectorpos = 0x0004;
m_int_pending &= ~PENDING_LEVEL1;
- if (!m_int1_active) m_flag[2] = false;
+ // Latches must be reset when the interrupt is serviced
+ // Since the latch is edge-triggered, we should be allowed
+ // to clear it right here, without considering the line state
+ m_flag[2] = false;
m_intmask = 0;
- LOGMASKED(LOG_INT, "***** INT1 pending\n");
+ LOGMASKED(LOG_INT, "** INT1 pending\n");
}
else
{
@@ -1717,7 +1720,7 @@ void tms9995_device::service_interrupt()
vectorpos = 0x0008;
m_int_pending &= ~PENDING_OVERFLOW;
m_intmask = 0x0001;
- LOGMASKED(LOG_INT, "***** OVERFL pending\n");
+ LOGMASKED(LOG_INT, "** OVERFL pending\n");
}
else
{
@@ -1727,15 +1730,16 @@ void tms9995_device::service_interrupt()
m_intmask = 0x0002;
m_int_pending &= ~PENDING_DECR;
m_flag[3] = false;
- LOGMASKED(LOG_DEC, "***** DECR pending\n");
+ LOGMASKED(LOG_DEC, "** DECR pending\n");
}
else
{
vectorpos = 0x0010;
m_intmask = 0x0003;
m_int_pending &= ~PENDING_LEVEL4;
- if (!m_int4_active) m_flag[4] = false;
- LOGMASKED(LOG_INT, "***** INT4 pending\n");
+ // See above for clearing the latch
+ m_flag[4] = false;
+ LOGMASKED(LOG_INT, "** INT4 pending\n");
}
}
}
@@ -1743,7 +1747,7 @@ void tms9995_device::service_interrupt()
}
}
- LOGMASKED(LOG_INT, "********* triggered an interrupt with vector %04x/%04x\n", vectorpos, vectorpos+2);
+ LOGMASKED(LOG_INTD, "*** triggered an interrupt with vector %04x/%04x\n", vectorpos, vectorpos+2);
// just for debugging purposes
if (!m_reset) m_log_interrupt = true;